This is Gary Benfold's opening sermon at the Aber Conference this year reminding us of what preaching is and does and what it can do under God. A great start to the week. Based on Jonah 3 it was called Aber's Vital Ingredient.
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.